Micro-jet laser water return prevention device

Abstract

This invention relates to the field of microjets laser technology and discloses a microjets laser anti-backflow device, comprising: a housing, wherein a water inlet is provided on the surface of the housing, a lens is installed on the inner wall of the housing, a water flow surrounding cavity is provided on the inner wall of the housing, and a flow stabilizing mechanism is provided on the inner wall of the water flow surrounding cavity; and a mounting block, wherein the mounting block is installed on the inner wall of the housing, and a plurality of water flow holes and a flow injection hole are respectively provided inside the mounting block, and the water flow holes and the flow injection hole are connected. This invention can reduce water flow turbulence and bubble generation, and can achieve step-by-step flow stabilization, avoid local eddies, and ultimately form an ideal laminar flow at the nozzle, thereby improving processing accuracy. It can also cut off the most common path for bubble generation, avoid large bubbles generated by turbulent mainstream flow and vortex entrainment of air, and prevent gas precipitation throughout the flow area caused by large fluctuations in flow rate or pressure.

Description

Technical Field

[0001] This invention relates to the field of microjet laser technology, and in particular to a microjet laser anti-backflow device. Background Technology

[0002] Microjets laser technology is an advanced technology that couples a high-energy laser beam into a micron-level high-pressure water jet, using the principle of total internal reflection at the water-air interface to guide the laser for processing. This technology perfectly combines the high energy density of the laser with the cooling, cleaning, and light-guiding properties of the water jet, achieving high-quality, low-damage processing of hard, brittle, and heat-sensitive materials. It has irreplaceable advantages in aerospace, semiconductor, and other fields. When the high-pressure water jet impacts the workpiece surface, it inevitably splashes in all directions, forming splash water. The splashed water droplets or water vapor accumulate and condense at the bottom of the expensive sapphire or diamond nozzle and at the adjacent microjets guide nozzle. These attached water droplets drip intermittently or continuously, interfering with the laminar flow state of the stable water jet below, directly affecting processing accuracy. In more severe cases, the accumulated water droplets can be heated by the laser energy, causing the nozzle to be destroyed instantly. Replacing the nozzle is not only costly but also requires complex recalibration, seriously affecting processing efficiency and equipment reliability.

[0003] Existing microjets laser anti-reverse water protection devices use coaxial auxiliary gas protection, which works on the principle of pneumatic purging. A coaxial or inclined compressed air ring forms an air curtain around the jet, dispersing the reverse water and water mist. This increases the energy consumption of compressed air, but it can effectively disperse some splashes and mist, which helps to stabilize the water jet. Alternatively, a high-speed rotating ejection disc is used, which works on the principle of centrifugal force ejection. A high-speed motor-driven rotating disc is installed below the nozzle, and the reverse water that hits it is ejected by centrifugal force. This active protection has a high efficiency in removing splash droplets. However, the above two anti-reverse water protection structures have many complex moving parts or external air sources, making it difficult to simultaneously and efficiently protect against large splashes, small droplets, and water mist. Therefore, a microjets laser anti-reverse water protection device is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a micro-jet laser anti-reverse water device that addresses the problem that micro-jet laser anti-reverse water devices have many structures and require complex moving parts or external air sources, making it difficult to simultaneously and efficiently protect against large particle splashes, fine droplets, and water mist.

[0005] This invention achieves the above objective through the following technical solution: a microjets laser anti-reverse water device, comprising:

[0006] The housing has a water inlet hole on its surface, a mirror installed on the inner wall of the housing, a water flow surrounding cavity formed on the inner wall of the housing, and a flow stabilizing mechanism provided on the inner wall of the water flow surrounding cavity.

[0007] The mounting block is installed on the inner wall of the housing. The mounting block has multiple water flow holes and one injection hole inside, and the water flow holes and the injection hole are connected.

[0008] Water flows into the upper surrounding cavity of the shell through the water inlet. The water inlet is tangential to the upper surrounding cavity. Compared with vertical injection, the water flow is more stable, reducing water turbulence and the generation of air bubbles.

[0009] The nozzle is installed on the inner wall of the bottom of the housing. The nozzle has a water outlet hole inside. The inner wall of the nozzle is provided with an anti-backflow mechanism. The nozzle is installed on the inner wall of the bottom of the nozzle. The nozzle is provided with an annular permeation hole.

[0010] The water flow in the upper surrounding cavity is guided by the fixed plate into the channel and flows into the middle surrounding cavity. The same water flow circulates once in the middle surrounding cavity and then enters the lower surrounding cavity through the fixed plate and channel. Similarly, it enters the bottom surrounding cavity. After circling once in the bottom surrounding cavity, it passes through the water flow hole, injection hole and outlet hole and is emitted together with the laser for processing. The water flow will circulate through four layers of water flow surrounding cavities, thereby achieving step-by-step flow stabilization, avoiding local eddies, and finally forming an ideal laminar flow at the nozzle, which can improve the processing accuracy.

[0011] The flow stabilizing mechanism includes a fixed plate, which is fixedly connected to the inner wall of the water flow surrounding cavity. A movable rod is slidably connected to the inner wall of the fixed plate via a spring. A guide plate is fixedly connected to the end of the movable rod away from the water inlet. An L-shaped plate is slidably connected to the inner wall of the water flow surrounding cavity. A channel is opened on the inner wall of the housing.

[0012] Preferably, the anti-backflow mechanism is a steel plate with a thickness of 0.1 mm. The laser in the jet water flow will penetrate the 0.1 mm steel plate, allowing the water flow and laser to penetrate the steel plate together and exit from the nozzle to process the workpiece. When the jet water flow comes into contact with the workpiece, it will splash. The splashed water flow and water mist will be completely blocked by the steel plate, so there will be no backflow. After the steel plate is used, you only need to open the gap between the nozzle and the spray head and place a new steel plate. It is very convenient and quick. The anti-backflow mechanism of this application has a compact structure, does not require complex moving parts or external air source, but can provide efficient protection against large particle splashes, fine droplets and water mist at the same time.

[0013] Preferably, the water flow surrounding cavity is composed of an upper surrounding cavity, a middle surrounding cavity, a lower surrounding cavity, and a bottom surrounding cavity, arranged from top to bottom as an upper surrounding cavity, a middle surrounding cavity, a lower surrounding cavity, and a bottom surrounding cavity. The number of fixing plates is three, and the three fixing plates are respectively installed in the upper surrounding cavity, the middle surrounding cavity, and the lower surrounding cavity.

[0014] When water flows into the upper surrounding cavity, it contacts the guide plate after circling once, pushing the guide plate to move. The guide plate moves the moving rod and compresses the spring. The moving rod moves the L-shaped plate, which obstructs the size of the inlet hole. At this time, the outlet area of ​​the inlet hole decreases. Under constant flow velocity, the reduced outlet area leads to increased flow resistance, and the pressure inside the inlet hole rises rapidly. At this time, the pressure sensor inside the inlet hole detects the pressure increase and sends an electrical signal to the water pump, causing it to reduce the flow velocity. When the flow velocity decreases, the pressure inside the inlet hole will decrease to the initial pressure. At this time, the reduced flow velocity causes the compressed spring on the moving rod to move the guide plate and the moving rod back a certain distance (not completely back to their original positions). The moving rod will no longer press against the L-shaped plate, causing the elastic element to move the L-shaped plate back a certain distance (not completely back to its original position). At this time, the L-shaped plate will still block the water inlet, and the L-shaped plate will remain in a new and specific displacement position. At this time, the reduced water flow impact force is exactly equal to the reset force generated by the displacement. At this time, the water flow will reach a new and different steady-state equilibrium point. At this equilibrium point, although the pressure is the same as the initial value, the flow velocity is lower, the outlet is partially blocked, and the L-shaped plate is in equilibrium. This equilibrium point can cut off the most common path for bubble generation, avoid large bubbles generated by the turbulence of the mainstream flow and the vortex entrainment of air, and also prevent gas precipitation throughout the entire flow area caused by large fluctuations in flow rate or pressure.

[0015] Preferably, the number of channels is three, and the three channels are respectively located between the upper and middle surrounding cavities, between the middle and lower surrounding cavities, and between the lower and bottom surrounding cavities.

[0016] Preferably, the end of the moving rod away from the guide plate contacts the L-shaped plate, a pressure sensor is provided on the inner wall of the water inlet, the pressure sensor is connected to the water pump that injects water, an elastic element is provided between the L-shaped plate and the fixed plate, and the channel is located on the side of the fixed plate away from the water inlet.

[0017] Preferably, the anti-backflow mechanism includes a mounting frame, which is rotatably connected to the circumferential surface of the nozzle. A second magnet is fixedly connected to the circumferential surface of the nozzle, and a first magnet is fixedly connected to the inner wall of the mounting frame on the side near the nozzle. The first magnet and the second magnet are magnetically attracted to each other.

[0018] Preferably, a detection plate is slidably installed on the inner wall of the mounting frame, a waterproof cover is fitted on the surface of the mounting frame, a plurality of water-permeable holes are opened on the side of the waterproof cover near the nozzle, and water-absorbing cotton is installed on the inner wall of the nozzle.

[0019] During micro-jet laser processing, the splashed water mist is absorbed by the absorbent cotton, thus achieving the effect of preventing water backflow.

[0020] Preferably, the detection plate is provided with water-sensitive color-changing ink, the waterproof cover is made of transparent plastic, the first magnet is in contact with the inner wall of the waterproof cover, and the second magnet is in contact with the outer surface of the waterproof cover;

[0021] After absorbing water for a long time, the absorbent cotton will become saturated. The water seeping out of the saturated absorbent cotton will come into contact with the waterproof cover and then with the detection plate through the water-permeable holes. The detection plate has water-sensitive ink, causing the detection plate to change color. Therefore, workers only need to observe whether the detection plate changes color to determine whether the absorbent cotton needs to be replaced. When replacing the absorbent cotton, the mounting frame is rotated open, the transparent waterproof cover is pulled out of the mounting frame, the detection plate is taken out of the mounting slot of the mounting frame, and the new detection plate is inserted into the mounting frame. Then, the waterproof cover is put on the mounting frame. The waterproof cover can prevent splashing water mist from interfering with the color change of the detection plate from the outside. Then, the mounting frame is rotated back to its original position, so that magnet one is attracted to magnet two through the waterproof cover, thereby achieving fixation.

[0022] Preferably, the anti-backflow mechanism further includes an exhaust pipe, which is installed on the inner wall of the nozzle, the fixing ring is fixedly installed on the surface of the exhaust pipe, and the retaining strip is fixedly connected to the circumferential surface of the fixing ring;

[0023] Backflow prevention can be achieved by installing an exhaust pipe to absorb the water mist. When installing the exhaust pipe, insert the retaining strip on the fixing ring into the mounting frame, then insert the exhaust pipe into the nozzle, and then rotate the mounting frame so that magnet one and magnet two on the mounting frame attract and fix it, thus fixing and locking the exhaust pipe after installation to prevent it from coming off during the movement of the nozzle. You can decide whether to install an exhaust pipe or water-absorbing cotton according to the actual use needs.

[0024] Preferably, the clip is slidably mounted on the inner wall of the mounting frame, and the circumferential surface of the fixing ring is in contact with the inner wall of the mounting frame.

[0025] Beneficial effects: This invention has a reasonable design, simple and stable structure, and strong practicality, and has the following beneficial effects:

[0026] 1. This micro-jet laser anti-backflow device allows water to enter the water flow surrounding cavity through the inlet hole, then through the water flow hole into the mounting block, and then through the injection hole in the mounting block into the water outlet hole in the nozzle. Finally, the water is jetted onto a steel plate through the water outlet hole. The steel plate blocks the jetted water flow, causing it to exit through the annular permeation hole on the nozzle. The laser in the jetted water then penetrates the millimeter-thick steel plate, allowing the water flow and laser to pass through the steel plate together and exit from the nozzle to process the workpiece. When the jetted water comes into contact with the workpiece, it splashes. The splashed water and water mist are completely blocked by the steel plate, so there is no backflow. After the steel plate is used, simply open the gap between the nozzle and the spray head and place a new steel plate. It is very convenient and quick. The anti-backflow mechanism of this application has a compact structure, does not require complex moving parts or external air sources, but can simultaneously provide efficient protection against large particle splashes, fine droplets and water mist.

[0027] 2. In this micro-jet laser anti-backflow device, water is injected into the upper surrounding cavity of the housing through the water inlet. The water inlet and the upper surrounding cavity are tangentially positioned, resulting in a more stable water flow compared to vertical injection, reducing turbulence and air bubble generation. The water flows through four layers of surrounding cavities, achieving gradual flow stabilization and avoiding local eddies. Ultimately, an ideal laminar flow is formed at the nozzle, improving processing accuracy. At this point, the L-shaped plate is displaced by the water flow and blocks the water inlet, causing an increase in internal pressure. The pressure sensor controls the water pump to reduce the flow rate and... The elastic element drives the L-shaped plate to partially reset, and the L-shaped plate will remain in a new and specific displacement position. At this time, the reduced water flow impact force is exactly equal to the reset force generated by the displacement. The water flow will reach a new and different steady-state equilibrium point. At this equilibrium point, although the pressure is the same as the initial value, the flow velocity is lower, the outlet is partially blocked, and the L-shaped plate is in force balance. This equilibrium point can cut off the most common path for bubble generation, avoid large bubbles generated by the turbulence of the mainstream flow and the vortex entrainment of air, and also prevent gas precipitation throughout the entire flow area caused by large fluctuations in flow rate or pressure.

[0028] 3. This micro-jet laser anti-reverse water device works by absorbing water spray during micro-jet laser processing. The water spray is absorbed by the absorbent cotton, thus preventing water backflow. After prolonged water absorption, the absorbent cotton becomes saturated. The water seeping from the saturated cotton comes into contact with the waterproof cover and then with the detection plate through the permeable holes. The detection plate contains water-sensitive ink, causing it to change color. Workers can determine if the absorbent cotton needs replacement simply by observing the color change of the detection plate. To replace the absorbent cotton, the mounting frame is rotated open, the transparent waterproof cover is removed, the detection plate is taken out of its mounting slot, and a new detection plate is inserted. The waterproof cover is then placed back on the mounting frame to prevent splashing water spray from interfering with the detection plate's color change. The mounting frame is then rotated back to its original position, allowing magnet one to adhere to magnet two through the waterproof cover, thus securing the absorbent cotton and facilitating timely replacement.

[0029] 4. This micro-jet laser anti-backflow device can prevent backflow by installing an exhaust pipe to absorb water mist. When installing the exhaust pipe, insert the retaining ring into the mounting frame, then insert the exhaust pipe into the nozzle, and then rotate the mounting frame so that magnet one and magnet two on the mounting frame attract and fix it, thereby fixing and locking the exhaust pipe after installation to prevent it from detaching during the movement of the nozzle. You can decide whether to install an exhaust pipe or water-absorbing cotton according to the actual use needs, thus expanding the applicability of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the anti-backflow mechanism of the present invention;

[0032] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0033] Figure 4 This is a half-sectional view of the shell structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the water flow surrounding cavity structure of the present invention;

[0035] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B in the middle;

[0036] Figure 7 This is a half-sectional view of the nozzle structure of the present invention;

[0037] Figure 8 This is a half-sectional view of the waterproof cover structure of the present invention;

[0038] Figure 9This is a schematic diagram of the exhaust duct structure of the present invention;

[0039] Figure 10 This is a schematic diagram of the fixing ring structure of the present invention.

[0040] In the diagram: 1. Shell; 2. Water inlet; 3. Lens; 4. Water flow surrounding cavity; 5. Mounting block; 51. Water flow hole; 52. Injection hole; 6. Nozzle; 61. Water outlet; 7. Nozzle; 8. Flow stabilizing mechanism; 81. Fixing plate; 82. Moving rod; 83. Guide plate; 84. L-shaped plate; 85. Channel; 9. Anti-backflow mechanism; 91. Mounting frame; 92. Detection plate; 93. Magnet one; 94. Magnet two; 95. Waterproof cover; 96. Water permeable hole; 97. Absorbent cotton; 98. Exhaust pipe; 99. Fixing ring; 910. Clip. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Example 1:

[0043] Combination Figure 1-10 The microjets laser anti-backflow device shown includes:

[0044] The housing 1 has a water inlet hole 2 on its surface, a mirror 3 installed on the inner wall of the housing 1, a water flow surrounding cavity 4 on the inner wall of the housing 1, and a flow stabilizing mechanism 8 installed on the inner wall of the water flow surrounding cavity 4.

[0045] Mounting block 5 is installed on the inner wall of housing 1. Multiple water flow holes 51 and one injection hole 52 are respectively opened inside the mounting block 5, and the water flow holes 51 and the injection hole 52 are connected.

[0046] The nozzle 6 is installed on the inner wall of the bottom of the housing 1. The nozzle 6 has a water outlet hole 61 inside. The inner wall of the nozzle 6 is provided with an anti-backflow mechanism 9. The nozzle 7 is installed on the inner wall of the bottom of the nozzle 6. The nozzle 6 is provided with an annular permeation hole.

[0047] The anti-backflow mechanism 9 is a steel plate with a thickness of 0.1 mm.

[0048] The water flow surrounding cavity 4 consists of an upper surrounding cavity, a middle surrounding cavity, a lower surrounding cavity, and a bottom surrounding cavity, arranged from top to bottom. Water flows into the upper surrounding cavity in the housing 1 through the water inlet 2. The water inlet 2 is tangential to the upper surrounding cavity. Compared with vertical injection, the water flow is more stable, reducing water turbulence and the generation of air bubbles. The water flows around the four layers of water flow surrounding cavities 4, thereby achieving gradual flow stabilization, avoiding local eddies, and finally forming an ideal laminar flow at the nozzle 7, which can improve processing accuracy.

[0049] In use, water flows into the water flow surrounding cavity 4 through the water inlet 2, then into the mounting block 5 through the water flow hole 51, and then into the water outlet 61 of the nozzle 6 through the injection hole 52 in the mounting block 5. Finally, the water is jetted onto the steel plate through the water outlet 61. The steel plate blocks the jetted water flow, causing the water to be discharged from the annular permeation hole on the nozzle 6. Then, the laser in the jetted water flow will penetrate the 0.1 mm steel plate, allowing the water flow and laser to penetrate the steel plate together and be ejected from the nozzle 7 to process the workpiece. When the jetted water flow comes into contact with the workpiece, it will splash. The splashed water flow and water mist will be completely blocked by the steel plate, so there will be no backflow. After the steel plate is used, you only need to open the space between the nozzle 6 and the nozzle 7 and put a new steel plate in place. It is very convenient and quick. The anti-backflow mechanism 9 of this application has a compact structure, does not require complex moving parts or external air source, but can provide efficient protection against large particle splashes, fine droplets and water mist at the same time.

[0050] Example 2:

[0051] Combination Figure 1-10 As shown, in this embodiment 2, based on embodiment 1, the flow stabilizing mechanism 8 includes a fixed plate 81, which is fixedly connected to the inner wall of the water flow surrounding cavity 4. The inner wall of the fixed plate 81 is slidably connected to a moving rod 82 via a spring. The end of the moving rod 82 away from the water inlet 2 is fixedly connected to a guide plate 83. An L-shaped plate 84 is slidably connected to the inner wall of the water flow surrounding cavity 4. A channel 85 is opened on the inner wall of the housing 1. There are three fixed plates 81, which are respectively installed in the upper surrounding cavity, the middle surrounding cavity, and the lower surrounding cavity. There are three channels 85, which are respectively located between the upper and middle surrounding cavities, between the middle and lower surrounding cavities, and between the lower and bottom surrounding cavities.

[0052] The end of the moving rod 82 away from the guide plate 83 contacts the L-shaped plate 84. A pressure sensor is provided on the inner wall of the water inlet hole 2. The pressure sensor is connected to the water pump that injects water. An elastic element is provided between the L-shaped plate 84 and the fixed plate 81. The channel 85 is located on the side of the fixed plate 81 away from the water inlet hole 2.

[0053] In use, water is injected into the upper surrounding cavity of the housing 1 through the water inlet 2. The water inlet 2 is tangential to the upper surrounding cavity, which makes the water flow more stable compared to vertical injection, reducing water turbulence and the generation of air bubbles. The water in the upper surrounding cavity is guided by the fixing plate 81 into the channel 85 and flows into the middle surrounding cavity. The same water flows around the middle surrounding cavity and then enters the lower surrounding cavity through the fixing plate 81 and the channel 85. Similarly, it enters the bottom surrounding cavity and then flows around the bottom surrounding cavity before passing through the water flow hole 51, the injection hole 52, and the outlet. The water hole 61 is emitted along with the laser for processing, while the water flow circulates through four layers of water flow surrounding cavity 4, thereby achieving gradual flow stabilization, avoiding local eddies, and ultimately forming an ideal laminar flow at nozzle 7, thus improving processing accuracy. When the water flow is injected into the upper surrounding cavity, it contacts the guide plate 83 after one revolution, pushing the guide plate 83 to move. The guide plate 83 drives the moving rod 82 to move and compress the spring. The moving rod 82 drives the L-shaped plate 84 to move. The movement of the L-shaped plate 84 will block the size of the water inlet hole 2. At this time, the outlet area of ​​the water inlet hole 2 decreases, and at a constant flow rate... As the outlet area decreases, the flow resistance increases, and the pressure inside the inlet 2 rises rapidly. At this point, a pressure sensor inside the inlet 2 detects the pressure increase and sends an electrical signal to the water pump, causing it to reduce the flow rate. Once the flow rate decreases, the pressure inside the inlet 2 drops back to its initial pressure. Because the flow rate is lower, the compressed spring on the moving rod 82 will cause the guide plate 83 and the moving rod 82 to reset a certain distance, but not completely. At this point, the moving rod 82 will no longer press against the L-shaped plate 84, causing the elastic element to drive the L-shaped plate 84 to reset a certain distance, but not completely. At this point, the L-shaped plate 84... However, it will block the water inlet 2, while the L-shaped plate 84 remains in a new and specific displacement position. At this time, the reduced water flow impact force is exactly equal to the reset force generated by the displacement. At this time, the water flow will reach a new and different steady-state equilibrium point. At this equilibrium point, although the pressure is the same as the initial value, the flow rate is lower, the outlet is partially blocked, and the L-shaped plate 84 is in force balance. This equilibrium point can cut off the most common path for bubble generation, avoid large bubbles generated by the turbulence of the mainstream flow and the vortex sucking in air, and also prevent gas precipitation throughout the entire flow area caused by large fluctuations in flow rate or pressure.

[0054] Example 3:

[0055] Combination Figure 1-10 As shown, in this embodiment, based on the first embodiment, the anti-backflow mechanism 9 includes a mounting frame 91, which is rotatably connected to the circumferential surface of the nozzle 6. A second magnet 94 is fixedly connected to the circumferential surface of the nozzle 6. A first magnet 93 is fixedly connected to the inner wall of the mounting frame 91 near the nozzle 6. The first magnet 93 and the second magnet 94 are magnetically attracted to each other.

[0056] A detection plate 92 is slidably installed on the inner wall of the mounting frame 91. A waterproof cover 95 is fitted on the surface of the mounting frame 91. Multiple water-permeable holes 96 are opened on the side of the waterproof cover 95 near the nozzle 6. Water-absorbing cotton 97 is installed on the inner wall of the nozzle 6. The water-absorbing cotton 97 can also be other water-absorbing materials, as long as it can absorb water mist and saturate and release water.

[0057] The detection plate 92 is equipped with water-sensitive color-changing ink, and the waterproof cover 95 is made of transparent plastic. Magnet 1 93 is in contact with the inner wall of the waterproof cover 95, and magnet 2 94 is in contact with the outer surface of the waterproof cover 95. The waterproof cover 95 can prevent splashing water mist from interfering with the color change of the detection plate 92 from the outside.

[0058] During use, when performing micro-jet laser processing, splashed water mist is absorbed by the absorbent cotton 97, thus achieving the effect of preventing backflow. Simultaneously, the absorbent cotton 97 will become saturated after prolonged water absorption. The water seeping from the saturated absorbent cotton 97 will come into contact with the waterproof cover 95 and then, through the water-permeable holes 96, with the detection plate 92. The detection plate 92 has water-sensitive ink, causing it to change color. Therefore, workers only need to observe whether the detection plate 92 changes color to determine if the absorbent cotton 97 needs replacement. When replacing the absorbent cotton 97, the mounting frame 91 is rotated open, and the transparent waterproof cover 95 is pulled out of the mounting frame 91. The detection plate 92 is then removed from the mounting slot of the mounting frame 91, and a new detection plate 92 is inserted into the mounting frame 91. The waterproof cover 95 is then placed over the mounting frame 91, preventing splashed water mist from interfering with the color change of the detection plate 92. The mounting frame 91 is then rotated back to its original position, allowing magnet 1 93 to adhere to magnet 2 94 through the waterproof cover 95, thus achieving fixation.

[0059] Example 4:

[0060] Combination Figure 1-10 As shown, in this embodiment four, based on embodiment one, the anti-backflow mechanism 9 also includes an exhaust pipe 98. The exhaust pipe 98 is installed on the inner wall of the nozzle 6, the fixing ring 99 is fixedly installed on the surface of the exhaust pipe 98, and the clip 910 is fixedly connected to the circumferential surface of the fixing ring 99. The suction force of the exhaust pipe 98 is only required to suck out the water mist, and the suction force does not need to reach the level of interfering with the water jet.

[0061] The clip 910 is slidably installed on the inner wall of the mounting frame 91, and the circumferential surface of the fixing ring 99 is in contact with the inner wall of the mounting frame 91.

[0062] When in use, the water mist can be drawn in by installing the exhaust pipe 98 to prevent backflow. When installing the exhaust pipe 98, insert the clip 910 on the fixing ring 99 into the mounting frame 91, then insert the exhaust pipe 98 into the nozzle 6, and then rotate the mounting frame 91 so that the magnet 93 and magnet 94 on the mounting frame 91 attract and fix it, thereby fixing and locking the exhaust pipe 98 after installation to prevent it from falling off during the movement of the nozzle 6. You can decide whether to install the exhaust pipe 98 or the water-absorbing cotton 97 according to the actual use needs.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A micro-jet laser anti-backflow water device, characterized in that: include: The housing (1) has a water inlet hole (2) on its surface, a mirror (3) is installed on the inner wall of the housing (1), a water flow surrounding cavity (4) is opened on the inner wall of the housing (1), and a flow stabilizing mechanism (8) is provided on the inner wall of the water flow surrounding cavity (4). Mounting block (5), which is installed on the inner wall of housing (1), and the interior of mounting block (5) is provided with multiple water flow holes (51) and one injection hole (52), and the water flow holes (51) and injection hole (52) are connected. The nozzle (6) is installed on the inner wall of the bottom of the housing (1). The nozzle (6) has a water outlet hole (61) inside. The inner wall of the nozzle (6) is provided with an anti-backflow mechanism (9). The inner wall of the bottom of the nozzle (6) is equipped with a nozzle (7). The nozzle (6) has an annular permeation hole.

2. The microjets laser anti-backflow device according to claim 1, characterized in that: The anti-backflow mechanism (9) is a steel plate with a thickness of 0.1 mm.

3. The microjets laser anti-backflow device according to claim 2, characterized in that: The water flow surrounding cavity (4) is composed of an upper surrounding cavity, a middle surrounding cavity, a lower surrounding cavity and a bottom surrounding cavity, arranged from top to bottom as an upper surrounding cavity, a middle surrounding cavity, a lower surrounding cavity and a bottom surrounding cavity. The number of fixing plates (81) is three, and the three fixing plates (81) are respectively installed in the upper surrounding cavity, the middle surrounding cavity and the lower surrounding cavity.

4. The microjets laser anti-backflow device according to claim 3, characterized in that: The flow stabilizing mechanism (8) includes a fixed plate (81), which is fixedly connected to the inner wall of the water flow surrounding cavity (4). The inner wall of the fixed plate (81) is slidably connected to a moving rod (82) by a spring. The end of the moving rod (82) away from the water inlet (2) is fixedly connected to a guide plate (83). The inner wall of the water flow surrounding cavity (4) is slidably connected to an L-shaped plate (84). The inner wall of the housing (1) is provided with a channel (85). There are three channels (85), and the three channels (85) are respectively located between the upper surrounding cavity and the middle surrounding cavity, between the middle surrounding cavity and the lower surrounding cavity, and between the lower surrounding cavity and the bottom surrounding cavity.

5. The microjets laser anti-backflow device according to claim 4, characterized in that: The end of the moving rod (82) away from the guide plate (83) is in contact with the L-shaped plate (84). A pressure sensor is provided on the inner wall of the water inlet (2). The pressure sensor is connected to the water pump that injects water. An elastic element is provided between the L-shaped plate (84) and the fixed plate (81). The channel (85) is located on the side of the fixed plate (81) away from the water inlet (2).

6. The microjets laser anti-backflow device according to claim 1, characterized in that: The anti-backflow mechanism (9) includes a mounting frame (91), which is rotatably connected to the circumferential surface of the nozzle (6). A magnet (94) is fixedly connected to the circumferential surface of the nozzle (6). A magnet (93) is fixedly connected to the inner wall of the mounting frame (91) near the nozzle (6). The magnet (93) and the magnet (94) are magnetically attracted to each other.

7. The microjets laser anti-backflow device according to claim 6, characterized in that: The inner wall of the mounting frame (91) is slidably fitted with a detection plate (92), the surface of the mounting frame (91) is covered with a waterproof cover (95), the waterproof cover (95) has multiple water-permeable holes (96) on the side near the nozzle (6), and the inner wall of the nozzle (6) is fitted with absorbent cotton (97).

8. The microjets laser anti-backflow device according to claim 7, characterized in that: The detection plate (92) is provided with water-sensitive color-changing ink, the waterproof cover (95) is made of transparent plastic, the first magnet (93) is in contact with the inner wall of the waterproof cover (95), and the second magnet (94) is in contact with the outer surface of the waterproof cover (95).

9. The microjets laser anti-backflow device according to claim 1, characterized in that: The anti-backflow mechanism (9) also includes an exhaust pipe (98), which is installed on the inner wall of the nozzle (6). The fixing ring (99) is fixedly installed on the surface of the exhaust pipe (98), and the clip (910) is fixedly connected to the circumferential surface of the fixing ring (99).

10. A microjets laser anti-backflow device according to claim 9, characterized in that: The card strip (910) is slidably installed on the inner wall of the mounting frame (91), and the circumferential surface of the fixing ring (99) is in contact with the inner wall of the mounting frame (91).

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